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1. 陕西师范大学地理科学与旅游学院,西安,710119
2. 神木市自然资源和规划局, 陕西 神木,719399
Published:2024
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YAN Yifei, BAI Qiang, SUN Hu, et al. Analysis of Spatio-temporal Characteristics of Vegetation Cover and Water Production Services in the Yellow River Basin[J]. 2024, 38(1): 130-139.
YAN Yifei, BAI Qiang, SUN Hu, et al. Analysis of Spatio-temporal Characteristics of Vegetation Cover and Water Production Services in the Yellow River Basin[J]. 2024, 38(1): 130-139. DOI: 10.13870/j.cnki.stbcxb.2024.01.002.
[目的] 黄河流域是我国重要的生态保护屏障
但其生态环境脆弱
研究黄河流域植被变化与产水服务之间的关系
为其生态建设和高质量发展提供保障。[方法] 基于NDVI数据和InVEST模型
采用趋势分析和相关分析方法
将植被变化与水源供给服务相结合
对2001—2020年黄河流域NDVI与产水服务的时序变化和空间特征进行分析
研究NDVI与产水服务的趋势变化和相互关系。[结果] (1)黄河流域NDVI与产水深度均呈现增加趋势
增速分别为0.05 /10
18.215 mm/10 a
NDVI以明显增长为主
产水深度则以不明显增长为主
此外
流域产水量也不断增长。(2)NDVI与产水深度联系紧密
二者在时间上呈显著正相关
相关系数为0.75(p<0.01)
空间上表现出东北正相关-西南负相关的空间分化。(3)较高植被覆盖度下产水深度增加速率最高
不同植被覆盖度下NDVI与产水深度均以正相关为主
但随着植被覆盖度增多
NDVI与产水深度的负相关比例不断增加
表明目前各类植被覆盖度下NDVI对产水的影响均是积极的
但随着植被覆盖度增加
其对产水深度的消极影响也不断增加。[结论] 黄河流域NDVI与产水服务近年来都呈现增长态势且密切相关
目前的植被恢复对产水依然表现出积极作用
但要注意过度植被恢复对植被生长产生消极影响
适度的植被恢复对黄河流域的产水服务有益。
[Objective] The Yellow River Basin is an important ecological protection barrier in China
but its ecological environment is fragile. Studying the relationship between vegetation changes and water production services in the Yellow River Basin provides guarantees for its ecological construction and high-quality development. [Methods] Based on NDVI data and InVEST model
trend analysis and correlation analysis methods were used to combine vegetation change with water supply services. The temporal and spatial characteristics of NDVI and water production services in the Yellow River Basin from 2001 to 2020 were analyzed
and the trend changes and interrelationships between NDVI and water production services were studied. [Results] (1) The NDVI and water production depth of the Yellow River basin showed an increasing trend
with the growth rate of 0.05/10 a and 18.215 mm/10 a respectively. The NDVI was mainly showing a significant increase
while the water production depth was mainly showing an insignificant increase. In addition
the water production in the basin was also continuously increasing. (2) NDVI was closely related to water production depth
and there was a significant positive correlation between the two in terms of time
with a correlation coefficient of 0.75 (p <0.01). The spatial differentiation showed a positive correlation in the northeast and a negative correlation in the southwest. (3) The rate of increase in water production depth was highest under higher vegetation coverage
and NDVI was mainly positively correlated with water production depth under different vegetation coverage. However
as vegetation coverage increased
the proportion of negative correlation between NDVI and water production depth continued to increase. At present
the impact of NDVI on water production under various vegetation cover levels is positive
but as vegetation cover increases
its negative impact on water production depth will continue to increase. [Conclusion] In recent years
NDVI and water production services in the Yellow River Basin have shown a growth trend and are closely related. Currently
vegetation restoration still shows a positive effect on water production
but it should be noted that excessive vegetation restoration can have a negative impact on vegetation growth. Moderate vegetation restoration is beneficial for water production services in the Yellow River Basin.
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